Silverback SRS/ HTI Flat Hop Up Rubber for SRS 70 degree +nub (4pcs/ set)

Silverback SRS/ HTI Flat Hop Up Rubber for SRS 70 degree +nub (4pcs/ set) Rubber Construction 70 Degree Rubber Works ideally with heavier BB Suitable For Silverback Desert Tech HTI Series Sniper Rifle Airsoft Guns Include 4 Piece