High-tension heat-treated steel spring (2"L before and 2"L after bend). Consists of 1/4"W center groove nylon wheel. Used by several patio door manufacturers. SKU: 41731631 MFG: B 570 Shop more products by Prime Line. We offer wide selection of Storm & Screen Door Hardware, with Life and Home you always get the best deals SHARE Share on Facebook Tweet on Twitter Share on Google+ Pin on Pinterest Free shipping over $35 $7.87 Quantity In Stock Add to cart Request a Bulk Quote Thank you for your quote request. We will be in touch. DETAILS Description DESCRIPTION Highlights: Roller O.D.:1" Spring tension nylon & steel Used by several patio door manufacturers Consists of 1/4"W center groove nylon wheel High-tension heat-treated steel spring (2"L before and 2"L after bend) Universal design will fit most applications Patio screen door roller assembiles FEATURES MFR: B 570 SKU: 41731631 UPC: 049793005700 Brand: Prime Line