bids are invited for 1 circular shape 560 mm dia pre cast rcc manhole cover with frame e.h.d -30 2 100 mm thick factory made precast rcc rectangular cover for drain of m-30 grade ( size 1.50m x 0.50 m x 0.10 m ) 3 100 mm thick factory made precast rcc rectangular cover for drain of m-30 grade ( size 1.20m x 0.50 m x 0.10 m ) 4 100 mm thick factory made precast rcc rectangular cover for drain of m-30 grade ( size 1.00m x 0.50 m x 0.10 m ) 5 100 mm thick factory made precast rcc rectangular cover for drain of m-30 grade ( size 2.00m x 0.30 m x 0.10 m ) 6 bituminous ready cold mix 25 kg bags. total quantity : 1580