supply, installation , commissioning of devices, equipments, instrument, machineries, tools etc. , boyles law apparatus , laboratory flywheel ( wall mountable ) to find moment of inertia , stoke’s law apparatus , stainless steel ball set ( solid ) radii  of individual sets: ( i )   2.5  mm ( ii )   3.0 mm ( iii ) 3.5 mm ( iv ) 4.0 mm ( v ) 4.5 mm. , glycerin ( chemical grade ) high viscosity , funnel ( a ) material: plastic ( b ) dimensions: ( i ) diameter of top - 100 mm, ( ii ) length of stem - 100 mm , spherometer ( a ) material: stainless steel / brass ( b ) range of  linear  scale: ( 10 – 0– 10 ) mm ( c ) graduation of  linear  scale:  1 mm , spherical convex mirrors ( a ) set 1: radius - 50 mm, focal length - 10 cm ( b ) set 2: radius - 50 mm, focal length - 15 cm ( c ) set 3: radius - 50 mm, focal length - 20 cm , spherical concave mirrors ( a ) set 1: radius - 50 mm, focal length - 10 cm ( b ) set 2: radius - 50 mm, focal length - 15 cm ( c ) set 3: radius - 50 mm, focal length - 20 cm , plane mirrors 6 cm x 8 cm , hollow metallic cylinder ( to measure volume of the cylinder ) length 4 cm internal diameter: 1 cm external diameter : 1.2 cm , spring constant apparatus , coefficient of linear expansion apparatus , steam boiler with bung / stopper , rubber tube diameter: 0.5 inch , friction table with glass top , spring balance ( hanging type with rectangular shape ) ( a ) material: stainless steel & powder coated cast iron ( b ) capacity: 250 gram ( c ) graduation: 5 gram , retort stand , slotted weight ( a ) material: stainless steel ( b ) set 1: mass - 5 g ( b ) set 2: mass - 10 g ( c ) set 3: mass - 20 g ( d ) set 4: mass - 50 g , liquid mercury ( laboratory ) , digital conductivitymeter with electrode , digital ph-meter , digital balance , magnetic stirrer with stirring bead , redwood viscometer number 1 , glass jar with lid 12cm -height, 6 cm- diameter , bod bottle 300ml., stoppered, made of borosilicate glass , burette 50 ml burette ( 0.1 ml divisions ) with ptfe stopcock, made of borosilicate ( 3.3 ) glass , beaker 250 ml., made of borosilicate ( 3.3 ) glass , beaker 500 ml., made of borosilicate ( 3.3 ) glass, , funnel diameter-2.5”, made of borosilicate ( 3.3 ) glass , funnel diameter-4”, made of borosilicate ( 3.3 ) glass , kohlrausch flask