Add to Cart Quick view SO-239 to 3/8 Insulated Adapter with 3/8 Female Coupler for Mobile Antennas MSRP: Now: $3.99 Was: This SO-239 to 3/8 Insulated Adapter with 3/8 Female Coupler for Mobile Antennas, is in excellent condition.It has the insulating washer made to mount though a 1/2 inch hole.This one is in excellent condition. MSRP: Now: $3.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $3.99 Was: Subtotal: Add to Cart