Auxiliary springs insert and fit inside long spring traps that boost the strength of their springs. Fits any size longsprings. Availability: Usually ships the same business day. aux$1.19, 12/$11.99 For orders or for a copy of our Free Catalog call 1-800-762-2706. Wholesale Catalog available also, Call for details. R-P Outdoors PO Box 1170 505 Polk Street Mansfield La. 71052