supply of union elbow size: 1/2 inch od & union tee 1/2 inch o.d etc. , union elbow size: 1/2 inch od, as per drawing no. icf/std 3-5-017, item no. 1 (materials spe cification as per note of drawing) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , union tee 1/2 inch o.d to drg no. icf/std 3-5-018 alt b item 1 and to icf spec icf/md/spec- 166. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]