Chapin 4 Gallon ProSeries Backpack Sprayer SP-61800Sku : 34735Mfgr Part # : SP-61800 Delivery : Ships today.Price : $217.76 ex-gst$250.42 inc-gst.Price per : Item Add to Cart 4-Gallon translucent tank with 4-inch wide mouth opening for easy filling and cleaning 3-Stage filtration system with in-tank removable/cleanable filter