O-ring kit for Bostitch RN45-B Coil Roofing Nailer William Hendricks Posted on Posted in Bostitch O-ring Kit for Bostitch RN45-BO-ring kit for the Bostitch RN45-B roofing Nailer DOES NOT include the Trigger O-rings Trigger leaks require trigger valve TVA6 Free Shipping in the US Available Qty: 10 This kit does not include the trigger O-rings