Inquiry (采购产品): spare part Price and delivery on a heavy duty rear head for the Bimba Flat 1 FO-502 PJ. Please include p/n needed to order. Also what does the PJ mean? Thank you **** Hidden Message ***** LeAnna Armstrong 97113 Company: Squires Electronics, Inc. E-mail: leanna@squires.com **** Hidden Message ***** leanna@squires.com