Sigma's rigid box spacers are used to provide a raceway between two steel outlet boxes or metal enclosures by connecting either side by side or back to back. SKU: 40529915 MFG: 49207 Shop more products by Sigma Electric. We offer lowest price on Electrical Fittings & Replacement Parts. 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 Normally ships within 24 hours $4.81 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: Height: 1/2 in. Shape: Round Material: Zinc Knockout Size: 1/2 in. UL Listed CSA Listed Connects two boxes or metal enclosures with 1/2-in threaded knockouts Two locknuts included Zinc die-cast construction Product is UL and CSA listed FEATURES MFR: 49207 SKU: 40529915 UPC: 031857492076 Brand: Sigma Electric